Bumper-beam draft-rigging.



E. G. WASHBURN. BUMPER BEAM DRAFT RIGGING.

APPLIOATION FILED AUG. 12, 1907.

Patented Aug. 3, 1909A [16172265565 i #(W :wf

illustrate the invention, like characters in-n also preferably casthollow in steel;

mann s'rnrns ser nir onnion;

EDWIN C. WASHBURN, OF MIN'NEAPOLIS,y MINNESOTA, ASSIGNOR, BY MESNEASSIGNMENTS, vTO COMMONWEALTH STEEL COMPANY, OF ST. LOUIS, MISSOURI,,f-CORPORATION OF NEW JERSEY.

BUMPER-:snaar DRAFT-ardente.

Patented Aug. 3, 1909.

.application ed August 12, 1907. Serial N @$88,164.

To all whom 'it may concern:

Be it known that I, EDWrN C. I/VASHBURN, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements' in Bumper-Beam Draft-Riggings; and I do hereby declare the following to be a full,clear, and ex act description ofthe invention, such as 'will enableothers skilled in the art to which it appertains to make and use thesaine.

My invention has for its object to improve that type of draft riggingwherein the coupler draft bar is connected to and has its base ofreaction against a bumper beam.

To the above ends, the invention 'consists of the novel devices andcombinations of devices hereinafter described and defined lin theclaims.

In the accompanying drawings, which.

dicate like parts throughout the several views.4 I

Referring to these drawings; Figure 1 is a view partly in plan andpartly in horizontal section showing my invention incorporated. in abumper beam and draft bar. Fig. 2 is a View partly in front elevationand partly in vertical section, with some parts broken away, showing'theparts illustrated in Fig. 1; and Fig. 3 is a vertical section taken onthe line x3 m3 of Fig. 1.

The bumper beam 1 is made hollow, being preferably cast in steel. At itscentral portion it is, provided with a bar receiving pocket 2, the topand bottom of which are formed by thickened portions la of the upper andlower plates of the beam, and the sides of which are formed by ribs thatdiverge slightly in a direction from the rear toward the right face ofthe beam. The upper and lower plates of the beam 1, on each side of thepocket 2, are formed with internal forwardly diverging reinforcing ribs3, and between and on each side of these ribs 3 the lower plates arepreferably'cut away, as shown at 4. By this arrangement, a maximumstrength is given te the beam with a minimum amount of metal. The

said forwardly diverging reinforcing ribs 3 produce a trough-likereinforcement for the said upper and lower plates of the4 bumper beam.The draft bar 5, which is short, is This draft bar is extended into thepocket 2, and

cylindrical in a vertical plane, as shown at 6, and closely fits thecorrespondingly shaped seat 2a formed at the' back or` inner extremityof the pocket 2 and, as shown, constituting the bulge in the rear plateor Wall of the bumper beam. A vertically extended coupling pin or bolt 7is extended through and pivote-ily connects the inner end ofthedraft'bar 5 to the bumper beam 1. The 'axis of this coupling pin 7 islocated coincident with the axis of the engaging semi-cylindricalextremities of the pocket 2 and draft bar 5, and when slight play ispermitted between said pin and the parts which it pivotally connects,the semi-cylindrical or rounded extremities of said draft bar and pocketwillbe pressed directly into engagement under bumping strains.

At the u per and lower surfaces of its probuffer lugs or shoulders 9formed on the forl wardly projecting face of the beam 1 above and belowthe said pocket 2. The engaging surfaces of these buffer lugs orshouldersS and 9 extend concentric to the axis of the pivot bolt 7, andhence, concentric to the axis of the rounded inner end of said draftbar.- In this waybufling strains are transmitted from the draft bar 5 tothe bumper beam 1 at several different places, to-wit, both at the frontand rear of the said beam.

The forwardly projectin end of the draft bar 5 terminates 1n vertica lyspaced ears 1() to which a coupling head, not shown, is adapted to beconnected for slight pivotal motion by means of a couling in 11.

Draft strains on the raft ar are, of course, taken and transmitted tothe bum )er beam through the coupling pin 7. The ateral oscillatorymovements of the draft bar, permitted by the forwardly diverging sidewalls of the lpocket 2, permit the draft' bar to adapt itse f to curve iA device of the kind described is especially adapted for application tothe front end of a locomotive, but may, ofcourse, be applied to the rearend of the engine or to the ends of cars or tenders.

TWhat I claim is 1. A hollow cast bumper beam having a tain of saidreinforcing ribs being extended said pocket, substantially as described.

o receiving pocket extendingto the rem' Wall oedeem r l' sidee, the saidbeem also having diagonal reiii-forcing ribs extending from the forwardortions of the sides of said pocket to the rear wall of said beam. Intestimony whereof l aflx my signature from the forward portions of theside Walls of l in presence of two Witnesses.

EDWIN WASHBURN.

draft bar receiving pocket at its central po tion, and Ithe upper andlower plates ofseid Vbeam having internal diverging reinforcing 4,ribson the opposite sides of said pocket, ce1'- 2. A hollow cust bumaerbeamhaving im l integrally formed centra ly `llocated draft bar lVlfitnesses:

l MAME Hom,

' tllereoL und having forwardly diverging i H. D. KILGQRE.

